Circular vibrating screen
The circular vibrating screening machine uses centrifugal force. The rotation of the eccentric mass in the vibrator generates the force. The force makes the screen box, vibrator, and other parts make a forced continuous circular or approximate circular motion. The materials follow the screen box for continuous throwing motion on the inclined screen surface. When thrown up, they are stratified; when falling, the particles pass through the screen.
The circular vibrating screening machine has the characteristics of reliable structure, high screening efficiency, and durability. It is convenient to have maintenance and safe to use. It is widely used in mining, building materials, energy, chemical, and other industries.
Linear vibrating screen
The linear vibrating screen uses the vibrating motor as a vibrating force. When you throw up materials on the screen, the materials move forward in a straight line. The material enters the inlet of the screening machine evenly from the feeder. Then it produces several specifications through the multi-layer screen. The on-sieve and under-sieve respectively discharge from their respective outlets.
The linear vibrating screen has a compact structure. Vibration parameters are reasonable. Its movement is stable with low energy consumption and high output.
Pictures of two types
circular vibrating screen machine 
linear vibrating screen machine
Main difference
1. Different trajectories
The material on the linear screen moves forward in a straight line.
The material on the circular vibrating sieving machine moves in a circular motion.
2. Different exciters
Linear vibrating sieving machine’s vibrator consists of two shafts. It works by the principle of vibration motor excitation, so it is also called a double-shaft vibrating sieving machine.
The circular vibrating screening machine is also called a single-shaft vibrating screen. The reason is that the exciter is a shaft and uses an inertial motor to work.
3. The installation inclination is different
Generally speaking, the inclination angle of the screen surface of the linear vibrating screen in production is small. The height of the screen is reduced, which is convenient for the process layout.
The circular vibrating screening machine usually has an installation inclination angle of 15-20 degrees. It can change the moving speed of the material along the screen surface and improve the screening efficiency.
4. Different materials
The selection of materials for the production of linear vibrating screens is mainly lightweight plates or stainless steel plates.
The selection of the circular vibrating screening machine is thicker. The box is made of manganese steel. It can resist the impact of the material during the screening process
5. Different applicable fields
Linear screens mainly screen fine particles, light specific gravity, and low-hardness materials. The machine generally plays a role in the food, chemical, and pharmaceutical industries.
The circular vibrating screening machine mainly screens materials with high specific gravity, large particles, and high hardness. It is widely used for mining industries such as mines, coal, and quarries. In addition, circular vibrating screens can also play a role for some difficult-to-screen materials.
Circular vibrating sieving machine 
linear vibrating screen
Common problems and solutions
- What to do if the screen frame breaks?
The fracture of the screen frame is generally because of the shaking of the vibrating screen frame.
Solution: You can thicken the side plate, or locally thicken the side plate near the exciter. The aim is to enhance the rigidity of the entire screen frame.
2. How to deal with blocked sieve holes?
In general, If the screen hole of the machine is blocked. The reason is the high mud content and water content in the input material. They make the material stick to the screen hole and blocks the screen hole.
Solution: First, clean the sieve holes. Then appropriately adjust the water spray amount and the inclination of the sieve surface.